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LP87725-Q1

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Automotive, three 3A low-noise buck converters, I/O LDO and load-switch PMIC for radar MMICs

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Data sheet

LP87725-Q1

ACTIVE
Data sheet Order now

Product details

Processor supplier Texas Instruments Processor name mmWave AWR, mmWave IWR Regulated outputs (#) 5 Step-down DC/DC converter 3 LDO 1 Vin (min) (V) 3 Vin (max) (V) 4 Vout (min) (V) 0.9 Vout (max) (V) 1.8 Iout (max) (A) 3 TI functional safety category Functional Safety-Compliant Configurability Factory programmable, Software configurable Features Output Short-Circuit and Overload Protection, Overtemperature warning and protection, Overvoltage protection, SPI, UVLO Rating Automotive Operating temperature range (°C) -40 to 125 Step-down DC/DC controller 0 Step-up DC/DC controller 0 Iq (typ) (mA) 0.02 Switching frequency (max) (kHz) 19200 Shutdown current (ISD) (typ) (µA) 20 Switching frequency (typ) (kHz) 17600
Processor supplier Texas Instruments Processor name mmWave AWR, mmWave IWR Regulated outputs (#) 5 Step-down DC/DC converter 3 LDO 1 Vin (min) (V) 3 Vin (max) (V) 4 Vout (min) (V) 0.9 Vout (max) (V) 1.8 Iout (max) (A) 3 TI functional safety category Functional Safety-Compliant Configurability Factory programmable, Software configurable Features Output Short-Circuit and Overload Protection, Overtemperature warning and protection, Overvoltage protection, SPI, UVLO Rating Automotive Operating temperature range (°C) -40 to 125 Step-down DC/DC controller 0 Step-up DC/DC controller 0 Iq (typ) (mA) 0.02 Switching frequency (max) (kHz) 19200 Shutdown current (ISD) (typ) (µA) 20 Switching frequency (typ) (kHz) 17600
VQFN-HR (RAG) 24 16 mm² 4 x 4
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
  • Functional safety-compliant device
    • Developed for functional safety applications
    • Documentation to aid ISO 26262 functional safety system design up to ASIL-B
    • BUCK, LDO and load switch output and Input supply overvoltage and undervoltage monitoring
    • Q&A Watchdog
    • Level or PWM error signal monitor (ESM)
    • ABIST and CRC
  • Input voltage: 3.3 V nominal (3 V to 4 V range)
  • 3 high-efficiency, low noise, high frequency step-down DC/DC converters:
    • Output voltage: 0.8 V, 0.82 V, 0.9 V to 1.9 V with 20 mV output voltage step
    • Maximum output current: 3.5 A
    • Switching frequency: 4.4 MHz, 8.8 MHz, and 17.6 MHz
  • 600 mA linear regulator with bypass \ load switch mode (LDO_LS1)
    • Input voltage, LDO mode: 1.2 V to 4 V
    • Output voltage: 0.6 V to 3.4 V with 50 mV output voltage step
    • Input voltage, bypass \ load switch mode: 1.6 V to 3.4 V
  • 400 mA load switch (LS2)
    • Input voltage range: 1.6 V to 3.6 V
    • On resistance 3.3-V input, 200 mA: 75 mΩ -typ
  • Output short-circuit and overload protection
  • Regulator output dynamic voltage scaling (DVS) through I2C interface
  • Input overvoltage protection (OVP) and undervoltage lockout (UVLO)
  • Two general purpose voltage monitors shared with LDO_LS1 and LS2 output
  • Overtemperature warning and protection
  • I2C interface supporting standard, fast mode, fast-mode+ and optional I2C address selection
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
  • Functional safety-compliant device
    • Developed for functional safety applications
    • Documentation to aid ISO 26262 functional safety system design up to ASIL-B
    • BUCK, LDO and load switch output and Input supply overvoltage and undervoltage monitoring
    • Q&A Watchdog
    • Level or PWM error signal monitor (ESM)
    • ABIST and CRC
  • Input voltage: 3.3 V nominal (3 V to 4 V range)
  • 3 high-efficiency, low noise, high frequency step-down DC/DC converters:
    • Output voltage: 0.8 V, 0.82 V, 0.9 V to 1.9 V with 20 mV output voltage step
    • Maximum output current: 3.5 A
    • Switching frequency: 4.4 MHz, 8.8 MHz, and 17.6 MHz
  • 600 mA linear regulator with bypass \ load switch mode (LDO_LS1)
    • Input voltage, LDO mode: 1.2 V to 4 V
    • Output voltage: 0.6 V to 3.4 V with 50 mV output voltage step
    • Input voltage, bypass \ load switch mode: 1.6 V to 3.4 V
  • 400 mA load switch (LS2)
    • Input voltage range: 1.6 V to 3.6 V
    • On resistance 3.3-V input, 200 mA: 75 mΩ -typ
  • Output short-circuit and overload protection
  • Regulator output dynamic voltage scaling (DVS) through I2C interface
  • Input overvoltage protection (OVP) and undervoltage lockout (UVLO)
  • Two general purpose voltage monitors shared with LDO_LS1 and LS2 output
  • Overtemperature warning and protection
  • I2C interface supporting standard, fast mode, fast-mode+ and optional I2C address selection

The LP8772x-Q1 device is designed to meet the power management requirements of the AWR, IWR, and other MMICs in various automotive and industrial radar applications. The device has three step-down DC/DC converters, a LDO regulator, and a load switch. The LDO is powered externally and intended for supplying Ethernet device or any other device in the system. The load switch is intended to cut off the 3.3 V IO supply during the sensor sleep mode. The device is controlled by I2C communication interface and by enable signals.

The low noise step-down DC/DC converters support factory programmed switching frequency of 17.6 MHz or 8.8 MHz or 4.4 MHz. High switching frequency and low noise across wide frequency range, enables LDO-free power solution which helps to reduce the solution cost and improve thermal performance. The switching clock is forced to PWM mode for excellent RF performance and can also be synchronized to an external clock. The LP8772x-Q1 device supports remote voltage sensing to compensate IR drop between the regulator output and the point-of-load (POL) which improves the accuracy of the output voltage.

The LP8772x-Q1 device supports programmable start-up and shutdown delays and sequences which are synchronized to the ENABLE signal. These sequences can also include GPO signal to control external regulators, load switches, and processor reset. The default settings for the device are programmed into nonvolatile memory (NVM) / one time programmable (OTP) memory at the factory and user cannot change the device default NVM / OTP settings. The device controls the output slew rate to minimize output voltage overshoot and in-rush current during device start-up.

The LP8772x-Q1 device is designed to meet the power management requirements of the AWR, IWR, and other MMICs in various automotive and industrial radar applications. The device has three step-down DC/DC converters, a LDO regulator, and a load switch. The LDO is powered externally and intended for supplying Ethernet device or any other device in the system. The load switch is intended to cut off the 3.3 V IO supply during the sensor sleep mode. The device is controlled by I2C communication interface and by enable signals.

The low noise step-down DC/DC converters support factory programmed switching frequency of 17.6 MHz or 8.8 MHz or 4.4 MHz. High switching frequency and low noise across wide frequency range, enables LDO-free power solution which helps to reduce the solution cost and improve thermal performance. The switching clock is forced to PWM mode for excellent RF performance and can also be synchronized to an external clock. The LP8772x-Q1 device supports remote voltage sensing to compensate IR drop between the regulator output and the point-of-load (POL) which improves the accuracy of the output voltage.

The LP8772x-Q1 device supports programmable start-up and shutdown delays and sequences which are synchronized to the ENABLE signal. These sequences can also include GPO signal to control external regulators, load switches, and processor reset. The default settings for the device are programmed into nonvolatile memory (NVM) / one time programmable (OTP) memory at the factory and user cannot change the device default NVM / OTP settings. The device controls the output slew rate to minimize output voltage overshoot and in-rush current during device start-up.
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* Data sheet LP8772x-Q1 Three Buck Converters, One Linear Regulator and One Load Switch for mmWave Radar Sensors datasheet PDF | HTML 18 Dec 2023

Design & development

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Simulation model

LP8772X-Q1 PSpice Model

SNVMCC9.ZIP (46 KB) - PSpice Model
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Simulation model

LP8772X-Q1 SIMPLIS Model

SNVMCC8.ZIP (63 KB) - SIMPLIS Model
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Calculation tool

PEET-GUI — PMIC Efficiency Estimator Tool (PEET)

The PMIC Efficiency Estimator Tool (PEET GUI) is a graphical user interface used to easily evaluate PMIC DC/DC regulator efficiency relative to your design conditions. The PEET GUI can be used to configure each DC/DC regulator separately and provides real-time efficiency and power dissipation data (...)
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